402 Matching Results

Search Results

Advanced search parameters have been applied.

in subjects: "Ducts"

open access

Computer program SCAP-BR for gamma-ray streaming through multi-legged ducts

A computer program, SCAP-BR, has been developed at Burns and Roe for the gamma-ray streaming analysis through multi-legged ducts. SCAP-BR is a modified version of the single scattering code, SCAP, incorporating capabilities of handling multiple scattering and volumetric source geometries. It utilizes the point kernel integration method to calculate both the line-of-sight and scattered gamma dose rates by employing the ray tracing technique through complex shield geometries. The multiple scatter… more

Date: December 8, 1977

Creator: Byoun, T. Y.; Babel, P. J. & Dajani, A. T.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

A survey of air flow models for multizone structures

Air flow models are used to simulate the rates of incoming and outgoing air flows for a building with known leakage under given weather and shielding conditions. Additional information about the flow paths and air-mass flows inside the building can only by using multizone air flow models. In order to obtain more information on multizone air flow models, a literature review was performed in 1984. A second literature review and a questionnaire survey performed in 1989, revealed the existence of 5… more

Date: March 1, 1991

Creator: Feustel, H.E. & Dieris, J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Solar heating system at Security State Bank, Starkville, Mississippi. Final report

Information is provided on the Solar Energy Heating System (airtype) installed at the branch bank building, northwest corner of Highway 12 and Spring Street, Starkville, Mississippi. This installation was completed in June, 1979. The 312 square feet of Solaron flat plate air collectors provide for 788 square feet of space heating, an estimated 55 percent of the heating load. Solar heated air is distributed to the 96 cubic foot steel cylinder, which contains two inch diameter rocks. An air handl… more

Date: August 1, 1980

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Fire protection countermeasures for containment ventilation systems

The goal of this project is to find countermeasures to protect High Efficiency Particulate Air (HEPA) filters, in exit ventilation ducts, from the heat and smoke generated by fire. Initially, methods were developed to cool fire-heated air by fine water spray upstream of the filters. It was recognized that smoke aerosol exposure to HEPA filters could also cause disruption of the containment system. Through testing and analysis, several methods to partially mitigate the smoke exposure to the HEPA… more

Date: August 25, 1980

Creator: Alvares, N.; Beason, D.; Bergman, V.; Creighton, J.; Ford, H. & Lipska, A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Thermal-hydraulic and structural considerations on the gap variation between fuel bundle and hexcan

One of the safety concerns in reactor operation is the temperature of the fuel elements, which are contained in a hexagonal duct, referred to as the hexcan. There are gaps between the fuel bundle and the hexcan, and the gaps somewhat affect thermal-hydraulic behavior of the fuel element. This paper investigates the impact of gap variations on the thermal-hydraulic responses of the fuel element as well as the possibility of fuel bundle and hexcan interaction. The gap variation between hex duct a… more

Date: January 1, 1992

Creator: Chang, L. K.; Lee, M. J. & Ku, J. Y.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Liquid-metal MHD flow in a duct whose cross section changes from a rectangle to a trapezoid, with applications in fusion blanket designs

This paper treats the liquid-metal MHD flow in a semi-infinite rectangular duct and a semi-infinite trapezoidal duct, which are connected by a finite-length transition duct. There is a strong, transverse, uniform magnetic field. The walls parallel to the magnetic field (sides) remain parallel, while the walls intersecting the magnetic field are twisted in the transition duct to provide the change in cross sectional shape. The left side has a constant height, while the height of the right side i… more

Date: April 1, 1986

Creator: Walker, J.S.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Hypothetical air ingress scenarios in advanced modular high temperature gas cooled reactors

Considering an extremely hypothetical scenario of complete cross duct failure and unlimited air supply into the reactor vessel of a modular high temperature gas cooled ractor, it is found that the potential air inflow remains limited due to the high friction pressure drop through the active core. All incoming air will be oxidized to CO and some local external burning would be temporarily possible in such a scenario. The accident would have to continue with unlimited air supply for hundreds of h… more

Date: January 1, 1988

Creator: Kroeger, P. G.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Duct Systems in Large Commercial Buildings: Physical Characterization, Air Leakage, and Heat Conduction Gains

No Description Available.

Date: March 30, 1999

Creator: Fisk, William J.; Delp, Woody W.; Diamond, Rick C.; Dickerhoff, Darryl J.; Levinson, Ronnen M.; Modera, Mark P. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Natural convection airflow and heat transport in buildings: experimental results

Observations of natural convection airflow in passive solar buildings are described. Particular results are given for two buildings supplementing other data already published. A number of generalizations based on the monitoring of the 15 buildings are presented. It is concluded that energy can be reasonably well distributed throughout a building by natural convection provided suitable openings are present and that the direction of heat transport is either horizontally across or upward.

Date: January 1, 1985

Creator: Balcomb, J.D. & Jones, G.F.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Lithium as a blanket coolant

Recent re-assessment of tokamak reactors which move towards smaller size and lower required field strength (higher beta)/sup 2/ change the picture as regards the magnitude of MHD effects on flow resistance for lithium coolant. Perhaps the most important consequence of this as regards use of this coolant is that of clear acceptability of such effects when the flow is predominantly transverse to the magnetic field. This permits defining a blanket that consists entirely of round tubes containing t… more

Date: January 1, 1977

Creator: Wells, W.M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

The impact of duct-to-duct interaction on the hex duct dilation

Dilation of the hex duct is an important factor in the operational lifetime of fuel subassemblies in liquid metal fast reactors. It is caused primarily by the irradiation-enhanced creep and void swelling of the hex duct material. Excessive dilation may jeopardize subassembly removal from the core or cause a subassembly storage problem where the grid size of the storage basket is limited. Dilation of the hex duct in Experimental Breeder Reactor II (EBR-II) limits useful lifetime because of these… more

Date: January 1, 1992

Creator: Lee, M. J.; Chang, L. K.; Lahm, C. E. & Porter, D. L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Theoretical approach for enhanced mass transfer effects in-duct flue gas desulfurization processes

Bench-scale and pilot-scale experiments have been conducted to measure the mass transfer and kinetic rates at simulated duct injection conditions. Section 2 describes the tank reactor test results. The stirred tank reactor was used to study absorption of SO{sub 2} into saturated Ca(OH){sub 2} solutions with varied ionic strengths. The results of current experiments were compared with previous tests using saturated Ca(OH){sub 2} solution and 0.1 M CaCl{sub 2}. Section 3 summarizes the status of … more

Date: January 18, 1990

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Scaleup tests and supporting research for the development of duct injection technology

Gilbert Commonwealth, Southern Research Institute and the American Electric Power Service Corporation have embarked on a program to convert DOE's Duct Injection Test Facility located at the Muskingum River Power Plant of Ohio Power Company to test alternate duct injection technologies. The technologies to be tested include slurry sorbent injection of hydrated lime using dual fluid nozzles, or a rotary atomizer and pneumatic injection of hydrated lime, with flue gas humidification before or afte… more

Date: May 1, 1989

Creator: Gooch, J. P.; Dismukes, E. B.; Dahlin, R. S.; Faulkner, M. G.; Klett, M. G.; Buchanan, T. L. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Solar-assisted electric clothes dryer using a home attic as a heat source

This study was undertaken to determine the suitability of using a southeastern home attic as a means of reducing the energy consumption of an electric clothes dryer. An inexpensive duct (duplicable for $25) was constructed to collect hot attic air from the peak of a south facing roof and introduce it into the dryer inlet. Instrumentation was added to measure inlet temperatures and operating time/energy consumption of the dryer. Standardized test loads, in addition to normal laundry, were observ… more

Date: unknown

Creator: Stana, J.M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Solar heating system for the First Baptist Church, 1500 E. Melgaard Road, Aberdeen, South Dakota 57401. Final report

This report includes the following: (1) acceptance test plan, (2) systems performance data, (3) pictures of completed system, (4) problems in building the system, (5) description of the system, (6) major maintenance problems, (7) revised blueprints, (8) installation, operation, and maintenance manuals, and (9) recommendations.(MOW)

Date: April 16, 1979

Creator: Salem, H.E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Study on eliminating fire dampers to maintain process confinement

The DOE General Design Criteria for the Defense Waste Processing Facility (DWPF) at the Westinghouse Savannah River Site (WSRS) requires the NFPA National Fire Codes to be incorporated into the design and simultaneously maintain process confinement integrity to prevent the release of radioactivity. Although the NFPA Standard for the Installation of Air Conditioning and Ventilation Systems, NFPA 90, requires fire dampers (FD) in HVAC duct penetrations of two hour rated fire barriers, closure of … more

Date: January 1, 1991

Creator: Walling, R. C.; Patel, J. B. & Strunk, A. J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Brayton-cycle heat-recovery system characterization program. Component test plan

The critical components of the glass furnace subject to corrosion/erosion are: the valve gate and the valve seat bottom and sides which can also be subject to warpage causing subsequent leakage and the furnace flues (or ducting). The Brayton System will be added to the glass furnace just downstream of the reversal valve. Hence, the inlet air to the flues will no longer be at ambient temperature but at a higher level between 800 to 1000/sup 0/F. Also, the exhaust gas for the Brayton System is re… more

Date: January 19, 1981

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Liquid-metal flow in a rectangular duct with a non-uniform magnetic field

This paper treats liquid-metal flow in rectangular ducts with thin conducting walls. A transverse magnetic field changes from a uniform strength upstream to a weaker uniform strength downstream. The Hartmann number and the interaction parameter are assumed to be large, while the magnetic Reynolds number is assumed to be small. If the magnetic field changes gradually over a long duct length, the velocity and pressure are nearly uniform in each cross section and the flow differs slightly from loc… more

Date: April 1, 1986

Creator: Walker, J.S.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Cross Section Evaluation Working Group benchmark specifications. Volume 2. Supplement

Neutron and photon flux spectra have been measured and calculated for the case of neutrons produced by D-T reactions streaming through a cylindrical iron duct surrounded by concrete. Measurements and calculations have also been obtained when the iron duct is partially filled by a laminated stainless steel and borated polyethylene shadow bar. Schematic diagrams of the experimental apparatus is included.

Date: September 1, 1986

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Models for gamma-ray holdup measurements at duct contact

The use of gamma-ray measurements to nondestructively assay special nuclear material holdup in DOE processing facilities has increased recently. A measurement approach that is relatively insensitive to deposit geometry involves withdrawing the detector from the holdup-bearing equipment far enough to validate an assumed point-, line-, or area-source deposit geometry. Because of facility constraints, these generalized geometry procedures are not always followed, and some ducts are measured at con… more

Date: January 1, 1991

Creator: Sheppard, G. A.; Russo, P. A.; Wenz, T. R.; Miller, M. C.; Piquette, E. C. (Los Alamos National Lab., NM (United States)); Haas, F. X. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Characterization of ventilation ductwork in Building K-33 at the Oak Ridge K-25 Site

An extensive sampling and analysis program was initiated in September 1991 to characterize the ductwork of Building K-33, which is located at the Oak Ridge K-25 Site. This building, 32.4 acres under roof, contains nearly 3 miles of main plenums without considering the side laterals, which are extensive. A large number (i.e., 131) of hexane-moistened wipe samples were taken from within randomly selected locations in the 16 main plenums and the side lateral network. Samples were analyzed for poly… more

Date: May 1, 1992

Creator: Mrochek, J.E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Remote video radioactive process evaluation, Savannah River Site

Specialized miniature low cost video equipment has been effectively used in a number of remote, radioactive, and contaminated environments at the Savannah River Site (SRS). The equipment and related techniques have reduced the potential for personnel exposure to both radiation and physical hazards. The valuable process information thus provided would not have otherwise been available for use in improving the quality of operation at SRS.

Date: January 1, 1990

Creator: Heckendorn, F.M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Waste-heat exchange system. Final technical report

The construction of a simple wind suction tunnel is described using one 4' x 8' sheet of interior plywood (1/4'') paneling board painted white and installation of one small 110 volt barrel type fan to pull warm air from the ceiling of a classroom and forcing air across the otherwise cool floor area. Warmer air that collects near the ceiling (waste heat) can, therefore, be reused (exchanged) thus requiring less use of energy consumption by existing heating system.

Date: unknown

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

THE COMPONENT TEST FACILITY – A NATIONAL USER FACILITY FOR TESTING OF HIGH TEMPERATURE GAS-COOLED REACTOR (HTGR) COMPONENTS AND SYSTEMS

The Next Generation Nuclear Plant (NGNP) and other High-Temperature Gas-cooled Reactor (HTGR) Projects require research, development, design, construction, and operation of a nuclear plant intended for both high-efficiency electricity production and high-temperature industrial applications, including hydrogen production. During the life cycle stages of an HTGR, plant systems, structures and components (SSCs) will be developed to support this reactor technology. To mitigate technical, schedule, … more

Date: September 1, 2008

Creator: Duncan, David S.; Balls, Vondell J. & Austad, Stephanie L.

Item Type: Article

Partner: UNT Libraries Government Documents Department